2111100999947 has 2 divisors, whose sum is σ = 2111100999948. Its totient is φ = 2111100999946.

The previous prime is 2111100999941. The next prime is 2111101000009. The reversal of 2111100999947 is 7499990011112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111100999947 - 2⁶ = 2111100999883 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111100999941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055550499973 + 1055550499974.

It is an arithmetic number, because the mean of its divisors is an integer number (1055550499974).

Almost surely, 2^{2111100999947} is an apocalyptic number.

2111100999947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111100999947 is an equidigital number, since it uses as much as digits as its factorization.

2111100999947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 53.

The spelling of 2111100999947 in words is "two trillion, one hundred eleven billion, one hundred million, nine hundred ninety-nine thousand, nine hundred forty-seven".